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aqua International Journal 9(1)



Volume 9, Issue 1 – October 2004

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Volume 9, Issue 1 – October 2004

Gerald R. Allen and Rudie H. Kuiter: Dunckerocampus naia, a new pipefish (Pisces: Syngnathidae) from the Western Pacific, pp. 1-6


A new species of pipefish, Dunckerocampus naia, is described on the basis of 2 specimens, 73.8-119.8 mm SL, collected from coral reefs at Fiji and north-eastern Kalimantan, Indonesia, at depths between 23-32 m. Underwater photographs indicate it also occurs at southern Japan, northern Sulawesi, Guam, and the Solomon Islands. It is easily confused with D. dactyliophorus from the western Pacific, which has a similar pattern of light and dark bars. However, it tends to have darker bars that lack the reddish hue of D. naia. Moreover, D. dactyliophorus has a bull’s eye-like pattern on the caudal fin, with a white central spot surrounded by a broad reddish ring and complete white margin. In contrast, the caudal of D. naia is mainly red, with a white margin confined to the upper and lowermost portions of the fin.

Richard Winterbottom: Three new species of Trimma (Pisces: Gobiidae) from the central, western and south Pacific, pp. 7-16


Three new species of the genus Trimma, all characterized by red or red brown bars on a pale background, are described. Trimma cana is characterized by eight well-defined red bars on the head and body on a white background, a naked nape, a well-developed interorbital trench, and a discreet dark bar across the dorsum just behind the eyes, with the melanophores lying on the medial surface of the frontal bone. Trimma sostra is distinguished by seven incomplete, diffusely-defined red bars on the head and body, a naked nape, a moderate interorbital trench, a dark spot on the lower pectoral fin base and another on the lower caudal peduncle. Trimma squamicana has a scaled nape, a moderate to deep interorbital trench with a poorly-developed or no postorbital trench, and eight red to reddish brown saddles over the dorsal midline, the posterior five of which have ventral counterparts.

Gerald R. Allen and John E. Randall: Two new species of damselfishes (Pomacentridae: Chromis) from Indonesian seas, pp. 17-24


Two new species of pomacentrid fishes are described from coral reefs of Indonesia.  Chromis monochroma is described from five specimens, 41.0-51.3 mm SL, collected at Flores in depths between 42 and 53 m. It has XIII,10-11 (usually 11) dorsal rays; II,11 anal rays; 16-17 (usually 17) pectoral rays; 3 spiniform caudal rays; 14-15 (usually 14) tubed lateral line scales; body depth 1.79-2.0 in SL, and lacks any distinctive colour markings. Chromis alpha is the closest relative, having the same meristic and morphometric data except usually 12 instead of 11 dorsal and anal soft rays, and 15 rather than 14 lateral line scales. It differs in colour, notably in having a black spot at the upper base of the pectoral fin and blackish posterior margins of the preopercle and opercle. The second new species, C. pura, is described from five specimens, 54.7-76.3 mm SL, collected at Pura, near Alor in the Lesser Sunda Islands, Indonesia in 18 m. It has XIII,12-13 (usually 12) dorsal rays; II,11 anal rays; 19-20 pectoral rays; 2 spiniform caudal rays; 16-18 tubed lateral line scales; and a colour pattern similar to C. flavomaculata from which it differs in having 25-27 instead of 29-34 gill rakers.

Sergio E. Gómez, Cristina A. Bentos and José. L. Ramirez: Humans attacked by piranhas (Pisces: Serrasalmidae) in Buenos Aires Province, Argentina, pp. 25-28


Piranhas are rare in the waters of Buenos Aires Province, Argentina. However, in January 2004, three people were attacked and wounded by fish in public swimming pools in the city of Salto (34°15’ S, 60°16’W), 270 km from the Paraná river. Probably responsible were Serrasalmus spilopleura, more than 20 specimens of which were caught in the pools.

Jacques Géry and Axel Zarske: Moenkhausia heikoi n. sp., a new tetra (Teleostei:, Ostariophysi: Characiformes:, Characidae) from the Rio Xingú basin, Brazil, with a supplementary description of the genus type species, pp. 29-43


Moenkhausia heikoi, a new endemic tetra from the Rio Xingú basin, is described and compared with related species, including the type species of the genus Moenkhausia xinguensis, which is phenotypically close and also endemic to the Xingú basin. The latter species is redescribed from the holotype and from new collections.

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